A test charge of +2 C is placed halfway between a charge of 7.5 C and another of 3.5 C separated by 10 cm.What is the magnitude of the force on the

A test charge of +2 μC is placed halfway between a charge of 7.5 μC and another of 3.5 μC separated by 10 cm.What is the magnitude of the force on the test charge in N?

A numeric value is expected and not an expression.

Ftot =

An electron is orbiting a nucleus which has a charge of 18e, under the action of the Coulomb force at a radius of 1.35× 10-10 m.Calculate the angular velocity of the electron, in radians per second.

A numeric value is expected and not an expression.

ω =